Internal stress and defect-related free volume in submicrocrystalline Ni studied by neutron diffraction and difference dilatometry

Jaromir Kotzurek, M. Hofmann, S. Simic, Peter Pölt, A. Hohenwarter, R. Pippan, Wolfgang Sprengel, Roland Würschum

Research output: Contribution to journalArticleResearchpeer-review

Abstract

A combined study of neutron diffraction and difference dilatometry
on submicrocrystalline Ni prepared by high pressure torsion aims
at studying the anisotropic behaviour during dilatometry and its
relation to internal stress and structural anisotropy. Macroscopic
stresses were undetectable in the dilatometer samples. Along with
specific tests such as post cold-rolling, this shows that an observed
anisotropic length change upon annealing is not caused by internal
stress, but can be explained by the inherent microstructure, i.e. the
anisotropic annealing of relaxed vacancies at grain boundaries of
shape-anisotropic crystallites.
Original languageEnglish
Pages (from-to)450-458
JournalPhilosophical magazine (London) / Letters
Volume97
Issue number11
DOIs
Publication statusPublished - 2017

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dilatometry
residual stress
neutron diffraction
extensometers
cold rolling
annealing
defects
crystallites
torsion
grain boundaries
microstructure
anisotropy

Fields of Expertise

  • Advanced Materials Science

Cite this

Internal stress and defect-related free volume in submicrocrystalline Ni studied by neutron diffraction and difference dilatometry. / Kotzurek, Jaromir; Hofmann, M.; Simic, S.; Pölt, Peter; Hohenwarter, A. ; Pippan, R. ; Sprengel, Wolfgang; Würschum, Roland.

In: Philosophical magazine (London) / Letters, Vol. 97, No. 11, 2017, p. 450-458.

Research output: Contribution to journalArticleResearchpeer-review

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